Hysteretic magnetoresistance and unconventional anomalous Hall effect in the frustrated magnet TmB4

ORAL

Abstract

We study TmB$_4$, a frustrated magnet on the Archimedean Shastry-Sutherland lattice, through magnetization and transport experiments. The lack of anisotropy in resistivity shows that TmB$_4$ is an electronically three-dimensional system. The magnetoresistance (MR) is hysteretic at low-temperature even though a corresponding hysteresis in magnetization is absent. The Hall resistivity shows unconventional anomalous Hall effect (AHE) and is linear above saturation despite a large MR. We suggest that both hysteretic MR and AHE arise from the formation of complex non-coplanar structures at magnetic domain walls.

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Authors

  • Sai Swaroop Sunku

    • Div of Physics and Applied Physics, Nanyang Technological University

  • Tai Kong

    • Ames Laboratory, U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
    • Ames Laboratory/Iowa State University
    • Ames Laboratory and Dept of Physics and Astronomy, Iowa State University

  • Toshimitsu Ito

    • National Institute of Advanced Industrial Science and Technology (AIST)

  • Paul C. Canfield

    • The Ames Laboratory and Iowa State University
    • Ames Laboratory, U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
    • Ames Lab., Dept. of Physics and Astronomy, Iowa State Univ.
    • Iowa State University/ Ames Laboratory
    • Ames Laboratory, Dept. of Phys. and Astro, Iowa State Univ.
    • Ames Laboratory and Dept of Physics and Astronomy, Iowa State University

  • B. Sriram Shastry

    • Univ of California-Santa Cruz
    • Physics Dept, University of California, Santa Cruz

  • Pinaki Sengupta

    • Div of Physics and Applied Physics, Nanyang Technological University

  • Christos Panagopoulos

    • Nanyang Technological University
    • Div of Physics and Applied Physics, Nanyang Technological University